Heat sole

ABSTRACT

A heating sole includes an upper pad formed with a plurality of ventilation holes and configured to be fitted in any shoe, a heating sheet having an upper and a lower layer and a filament fitted between the upper and lower layers so that the filament is completely enclosed by the upper and lower layers thereby insulating the filament from outside, the filament being connected with a temperature sensor, the heating sheet being formed with a plurality of ventilation holes aligned with the ventilation holes of the upper pad, the temperature sensor being connected with an electrical cord provided with an electrical connector at an outer end thereof, the electrical connector being adapted to engage with a battery box in which there is a rechargeable battery, a lower pad integrally made of foam rubber and formed with a raised edge at a rear portion thereof, the raised edge having a notch for passage of the electrical cord, the lower pad being formed with a plurality of ventilation holes aligned with the ventilation holes of the heating sheet and the upper pad, whereby the heating sole can automatically keep a wearer&#39;s foot at a constant temperature.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] This invention is related to a heat sole and in particular to one which can keep a wearer's foot warm.

[0003] 2. Description of the Prior Art

[0004] One's hands and feet will feel especially cold in winter, and over a long period, it becomes difficult to move in cold conditions. Further, the feet may even become frostbitten if they are subject to freezing conditions for a long time. If the feet can remain warm, it will help the blood circulation in the feet and will cause a corresponding warmth in the body, thereby increasing one's working efficiency. The conventional way to keep the feet warm is achieved by means of socks and shoes, for isolating the feet from cold weather outside. However, this method is not efficient, as the socks and shoes cannot keep the feet warm So, it is the purpose of this invention to keep the feet warm, and thus to also keep the entire body warm.

SUMMARY OF THE INVENTION

[0005] This invention is related to a heating sole for a shoe.

[0006] According to a preferred embodiment of the present invention, a heating sole includes an upper pad formed with a plurality of ventilation holes and configured to be fitted in any shoe, a heating sheet having an upper and a lower layer and a filament fitted between the upper and lower layer so that the filament is completely enclosed by the upper and lower layers thereby insulating the filament from outside, the filament being connected with a temperature sensor, the heating sheet being formed with a plurality of ventilation holes aligned with the ventilation holes of the upper pad, the temperature sensor being connected with an electrical cord provided with an electrical connector at an outer end thereof, the electrical connector being adapted to engage with a battery box in which there is a rechargeable battery, a lower pad integrally made of foam rubber and formed with a raised edge at a rear portion thereof, the raised edge having a notch for passage of the electrical cord, the lower pad being formed with a plurality of ventilation holes aligned with the ventilation holes of the heating sheet and the upper pad, whereby the heating sole can automatically keep a wearer's foot at a constant temperature.

[0007] It is the primary object of the present invention to provide a heating sole which can automatically warm one's feet in a short time.

[0008] It is another object of the present invention to provide a heating sole which has a raised edge for preventing the heat evolved from the sole from dispersing away.

[0009] It is still another object of the present invention to provide a heating sole which is ergonomic in configuration.

[0010] It is still another object of the present invention to provide a heating sole which can keep the sole at a constant temperature.

[0011] It is a further object of the present invention to provide a heating sole which is simple in construction and easy to manufacture.

[0012] The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

[0013] Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014]FIG. 1 is a perspective view of the present invention;

[0015]FIG. 2 is an exploded view of the present invention;

[0016]FIG. 3 illustrates the passage of the electric cord through a notch of the lower pad;

[0017]FIG. 4 is a sectional view of the temperature controller;

[0018]FIG. 5 is a sectional view of the present invention; and

[0019]FIG. 6 is a working view of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0020] For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to describe same. It will, nevertheless, be understood that no limitation of the scope of the invention is thereby intended, alterations and further modifications in the illustrated device, and further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates.

[0021] With reference to the drawings and in particular to FIG. 1 thereof, the heat sole 1 according to the present invention generally comprises an upper pad 11, a heating sheet 12 and a lower pad 13.

[0022] The upper pad 11 is formed with a plurality of ventilation holes 111 and may be made of any material which can be joined with the heating sheet and the lower pad by an adhesive agent. The upper pad 1 is configured to be fitted in any shoe.

[0023] The heating sheet 12 includes an upper and a lower layer 121 and a filament 122 fitted between the upper and the lower layers 121, so that the filament 122 is completely enclosed by the upper and lower layers 121 thereby preventing the filament 122 from getting damp. The filament 122 is connected with a temperature sensor 14. The heating sheet 12 is also formed with a plurality of ventilation holes 140 aligned with the ventilation holes 111 of the upper pad 11.

[0024] Referring to FIG. 4, the temperature sensor 14 is composed of two metal members 141 which will contact with each other when the temperature is below a predetermined value, but will separate from each other when the temperature is above a predetermined value. The temperature sensor 14 is connected with an electrical cord 142 provided with an electrical connector 143 at the outer end. The electrical connector 143 is adapted to engage with a battery box 100 in which there is a rechargeable battery 10. The battery box 100 is provided with a switch 101 for controlling the connection of the battery 10 to the filament 122 and a clip 102 for mounting the battery box 100 on a sock 2 via an adhesive band 21 (see FIG. 6).

[0025] The lower pad 13 is integrally made of foam rubber or the like and formed with a raised edge 130 at the rear portion thereof. The raised edge 130 has a notch 134 for the passage of the electrical cord 142. The lower pad 13 is also formed with a plurality of ventilation holes 133 aligned with the ventilation holes 14 of the heating sheet 12 and the upper pad 11.

[0026] It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

[0027] While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention. 

I claim:
 1. A heating sole comprising: an upper pad formed with a plurality of ventilation holes and configured to be fitted in any shoe; a heating sheet having an upper and a lower layer and a filament fitted between said upper and lower layers so that said filament is completely enclosed by said upper and lower layers thereby insulating said filament from outside, said filament being connected with a temperature sensor, said heating sheet being formed with a plurality of ventilation holes aligned with said ventilation holes of said upper pad, said temperature sensor being connected with an electrical cord provided with an electrical connector at an outer end thereof, said electrical connector being adapted to engage with a battery box in which there is a rechargeable battery; a lower pad integrally made of foam rubber and formed with a raised edge at a rear portion thereof, said raised edge having a notch for passage of said electrical cord, said lower pad being formed with a plurality of ventilation holes aligned with said ventilation holes of said heating sheet and said upper pad; whereby said heating sole can automatically keep a wearer's foot at a constant temperature.
 2. The heating sole as claimed in claim 1, wherein said temperature sensor is composed of two metal members which will contact with each other when temperature is below a predetermined value, but will separate from each other when temperature is above a predetermined value.
 3. The heating sole as claimed in claim 1, wherein said battery box is provided with a switch for controlling connection of said battery to said filament and a clip for mounting said battery box on a sock via an adhesive band. 